Carton and like container



Jan. 20, 1942. K. B. J. BLAKE MORE 2,270,236

CARTON AND LIKE CONTAINER I F'iledOct. 11, 1938 Z5- J 3/01? more 4i torn.

' Patentedglan 20,1942 i V 1 or null; finch cartons; are bein ""eco omical onertrn-isfsho inf' i'icures 1 m; Figure 1 -which the carton 'is Figure zflbeing' a s a I Figure 3' being a sectional view 'on' the line 3-3 of P18111212 with the. transverse dimensions erasgerated ior 'clearnessfand N Figured beingaflperspective view ot the compirited. carton in itsdistended condition; whilst I Figure: is a diagram showing alternative shapes'o'i biahks.

"or other creasable sheet material is made irom J arectangular'piece.'f'ljwhich has four creases or lines omearnessgcneor which I! isclose to and 'paralle ithdhe' side edge '13; another; I l, exi i 's t sqna Wes lheflle s i 6f e .q aneabyftne linel campus; the remain- 6',-extendjtroin' a"common "part dfined by the line I! is square. The line oi weaknessfifi bisects the whole of the side I! and the line meets the side I! a little above its mid point. in folding the blank to the position shown in Figure '2, it is folded about the diagonal i4, and the two triangular parts adjacent the end are inturned so that the corner hygienic for: the reh an object to provide an Qbeing nd: new a oithe jfcreariedfblarikffrom,

"Referring to Figures El todr alcarton of paper":

nemendi uiar'to the two. A |!'rep'ective ly;. which meet 1 at the end 20 of th 'diagoiiarll; The longitudinal dimension-0t the;pieceil l exceeds by a small j t "dimension, and the larger biiaronwz l goomma v h 'Kenneth rimes'memm, allyde lngland i October 11, 1938, Serial No. 234,464 m Greatfirltaln 0mm 25, 1931 j soni (cacao-522) r v folding line,disposed a short distance'away from the correspondingedges of the blank, so that 1 aspressure isapplied to the blank if to stick the halves of the sidestogetherthe blank will be oflset, to a small degreefjust above the adhering surface. The eflect of the offsetting is "clearly 7 shown in Figure 3. 1fhe carton is completed, I after reniovingins'ert', bysticking the flap 24 and the corner 25 to'the outer margin of the edge 26 oi, the blank l'l. andjby subjecting the blank to await bath whichrenders'the'material imp rVI us'to'milk' or other liquids. The effect of the ofiset caused'by the formerij results in the stuck surfaces of the edges l8-and [9' being protected by a head of wax which is indicated at 21 in Figure 3 also the offsetting simplifiesthe waxingot the cartoninasmuch as the" internal sur faces of the side walls are separated. A filling and outlet opening is left atthe upper end of the carton by cutting away the upper corner, for

example along the line 28. Figured shows the carton in its distended posi- [tion' in which it is in the form substantially of a triangular-pyramid; the line of weakness I4 ex- 20 is coincident with the wing corner 2|, with the wing corner 22 disposed coincident with the,

lower-end of the line or weakness H, In the flattened condition thc'two halves oi each of the sides ll and I! are stuck together after the loose insert or former, indicated by broken .lines at 28,

is positioned on the blank ii. The former 21 has a line of weakness coincident with the diagonal tendingalong the base 29 from one corner thereoi. and along the side 30 opposite said corner to divide the base 29 and side 30 centrally, whilst the lines or weakness l5 and I6 extend obliquely from the othercorners of the base to a common point'in theline H on the rears'ide 30. The junction between the base 29 and the creased side a 10,- and the junction between the latter and the two-uncreased sides 3| and 32 are not sharply defined but are rounded and blend gradually. The two flanges 33 and 34 by which the lower edgesof 'the sides and 32 are united-to the base 28 (San 'bereiniorced by comparatively rigid strips 35 and 36 disposed over said flanges either at the inside "or outside. :-The reinforcingstrips 1 are preferably 'made of a thin strips of 5 wood which are cut across the grain so that the supporting edges of the strips are end-grained. In the case described these reinforcing strips are shown at the inside or the flanges.

By constructing the carton from the, blank shown in Figure l, the junction between the uncrea'sed sides 3! and 3 2 is normal to the base 29. However, if desired, theblank may be so shaped that the resulting cartonwill'have this junction at, an angle to the base either sloping away from or towards the opposite; creased, side. 'Ifhis and other possibilities in respectof, the shape of the blank will be clear from Figure 5, whichis essentially ,diagrammatic.,, 'ln ge'neral, theblank is N and has its shorter edges, remote from its at iorfiiedzfrom a six-[sided figure ..ABCDEF;--sym-- metrical about its diameter AD. It will readily be seen that the line AB (or AF) represents the front edge of the carton. Again BC and CD, with DE and EF, are the base lines, being all equal to one another when the matter is considered diagrammatically; that is to say, ignoring the necessity for tum-overs and so on. The angle ABC determines the slope of the front edge; the-angle CDE determines the front base angle; in other words, the spread between the sides. Finally, the length CE determines the width of the carton across the rear edge. The figure shows in broken lines several ways in which the blank can be varied. In particular, it is noted that the lines BC and CD can become one straight line, BCD thus giving a four-sided cutting blank. Such forms reduce or eliminate waste when the blanks are being cut from a reel.

A carton in accordance with the invention can be distended from its flattened condition by hand or can be distended by the action of filling. This latter method is of particular advantage where the carton is to be filled with a liquid to be consumed, for it will be appreciated that the liquid comes into contact with only a very small quantity'of air, whereas with the milk cartons as at present in use, this is not the case.

The opening at the top of the carton can be closed by any known or convenient means, for example by a length of channeled metal strip. Also the margin of the opening can be folded over when flattened out. v

Cartons or like containers in accordance with the invention can be packed in stacks or bundles before being filled and, when filled, can be stored or stacked with a minimum amount of waste space Also, when filled, they can conveniently be arranged for display purposes about a centre, and as the apices of several cartons can be disposed close to one another, several can be held in the hand at one time.

What I claim is:

l. A one-piece carton having a triangular base, two triangular sides, and a triangular rear, with a line of weakness extending from the apex of the carton centrally down the rear and along the base, and two .other lines of weakness extending from the two rear base corners to a common point in the central line of weakness, the carton having a sealed joint along the edge common to the two sides. and having sealed jointsbetween the sides from the two rear corners to a common point in the central line of weakness. the carton having a sealed joint along the edge common to the two sides, and having sealed joints between the sides and base, said sides having portions which extend below the plane of the base and are united to the base by two depending flanges 1ntegral with the base, the depending flanges being reinforced by wooden strips cut across the grain.

3. A one-piece carton having a triangular base, two triangular sides, and a triangular rear, with a line of weakness extending from the apex of the carton centrally down the rear and along the base, and two other lines of weakness extending from the two rear base corners to a common point in the central line of weakness, the carton having a sealed joint along the edge common to the two sides, and having sealed joints between the sides and base, the sides being united to the base by flanges depending from the base, wherein just above their union with the flanges of the base the sides are offset to a small degree so that when the carton is subjected to a wax bath, a bead of wax will extend immediately over the junctions between the sidesvand the base.

4. A carton h'aving a triangular base, two triangular side walls. and a triangular rear wall, a filling and emptying orifice at the apex of the carton, with a folding line extending from said orifice centrally down the rear wall and contincorner thereof, and two other folding lines 'extending from the two rear base comers to a common point on said central folding line on said rear wall, the rear wall being integrally joined with the side and bottom walls and joined thereto in operative position along rounded corners, and the edge between said side walls and the edges between the side walls and said bottom wall being adhesively joined together, the edges between said side walls being defined relatively sh'arp.

5. The method of producing a carton which consists in folding a single rectangular sheet of material substantially symmetrical about a diagonal, inturning the sheet at one comer which is at the end of the diagonal, so that this corner is coincident with the two wing comers and lies between them with the two edges of the sheet immediately adjacent said corner lying in a common plane, adhesively joining the edges of the other two sides of the sheet adjacent the opposite end of the diagonal and adhesively joining the edges of the two halves of each of the intumed sides with the edgesof the adjacent two halves of each of the two wing sides in face contacting relation, cutting off a portion of the container adjacent the said opposite end of said diagonal to form a filling and emptying opening for said container, and spreading said, wing sides.

KENNETH BERTRAM JAMES BLAKEMORE. 

